Supercells are the mightiest of the thunderstorms. They can roll for hours while maintaining tornadoes and damaging hail.

Wind shear is the most important determinant of severe weather potential as long as sufficient atmospheric instability exists ...

Again, that cap may limit thunderstorm development, however, conditions remain favorable, with sufficient instability and wind shear to support a few rotating thunderstorms (supercells) capable of ...

Severe Thunderstorm, Tornado Watches, remain in effect, however the severe weather threat is winding down from west to east ...

The required conditions for a thunderstorm to produce a tornado are warm humid air near the surface with cold dry air above.

Supercell thunderstorms, however, can last several hours and track hundreds of miles. The key to that longevity is wind shear. If winds above the ground are much faster and from a different ...

FOX 17 News is no longer in Code Red Weather Alert after the severe thunderstorm watch was canceled for parts of Southern ...

Rich Gulf moisture will stream northward across Kansas and Missouri into Nebraska and Iowa. Moderate to strong instability is ...

Light rain early Sunday morning will give way to a First Alert Weather Alert Day on Monday due to the risk of severe ...

Tonight, weather stays quiet and cools down. Overnight lows fall into the 40s and even 30s in some spots. Tomorrow is cool ...

Severe storms moved through Central Iowa but stayed focused in northern Iowa, where the highest risk was located for the day.